MarkBarbieri
Semi-retired
- Joined
- Aug 20, 2006
Without IS, the rule of thumb for a 200mm focal length is a shutter speed of 1/200. Given that you use a 1.6x body (if I recall correctly), that should be adjusted to 1/320. At f/4.0, you can shoot in even bright overcast conditions with a reasonable ISO.
Check the shots you've taken in different conditions and look at the shutter speed, aperture, and ISO settings. That should give you a reasonably good idea.
I love having IS on my 70-200mm, but it would still be a very, very useful lens without it. That would be true even at f/4.0 I fact, I would wager that a small majority of my shots are taken with a shutter speed that does not require IS and I usually use f/4.0 unless I'm trying to absolutely maximize light gain or minimize DOF.
Check the shots you've taken in different conditions and look at the shutter speed, aperture, and ISO settings. That should give you a reasonably good idea.
I love having IS on my 70-200mm, but it would still be a very, very useful lens without it. That would be true even at f/4.0 I fact, I would wager that a small majority of my shots are taken with a shutter speed that does not require IS and I usually use f/4.0 unless I'm trying to absolutely maximize light gain or minimize DOF.